CN104087878B - A kind of preparation method of engine cylinder piston matrix material - Google Patents
A kind of preparation method of engine cylinder piston matrix material Download PDFInfo
- Publication number
- CN104087878B CN104087878B CN201410306561.4A CN201410306561A CN104087878B CN 104087878 B CN104087878 B CN 104087878B CN 201410306561 A CN201410306561 A CN 201410306561A CN 104087878 B CN104087878 B CN 104087878B
- Authority
- CN
- China
- Prior art keywords
- base substrate
- piston
- titanium carbide
- sapphire whisker
- pressurizeed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
A preparation method for engine cylinder piston matrix material, belongs to field of metal matrix composite.First by diadust, sapphire whisker, titanium carbide fibre reinforcement powder and polyvinyl alcohol solution are 20 ~ 25% according to volume accounting, 5 ~ 10%, 5 ~ 10%, carry out press forming after the ratio of 55 ~ 70% mixes to be enhanced body base substrate, base substrate is dried within 4 ~ 5 hours, to be placed in infiltration stove graphite jig in 50 ~ 60 DEG C in atmosphere and is carried out preheating, then be Al ~ (10 ~ 12) Si% by composition, temperature is that the molten aluminium alloy of 700 ~ 750 DEG C is poured in graphite jig and pressurizeed, diamond particles is obtained after having pressurizeed, sapphire whisker and react the aluminum matrix composite block that the titanium silicon-carbon fiber composite that generates strengthens by titanium carbide and aluminum silicon alloy infiltration process situ, then carry out processing according to final piston size and obtain finished product.Piston mass prepared by the present invention is light, in use procedure high, the thermal diffusivity of dimensional stability and wear resisting property good, stability and the reliability of cylinder operation can be improved comprehensively.
Description
Technical field
The invention belongs to field of metal matrix composite, relate to a kind of preparation method of engine cylinder piston matrix material.
Background technology
Along with improving constantly of rotating speed of automobile engine, velocity of piston also improves thereupon, and piston of gasoline engine speed can reach 11-16m/s, and diesel engine piston speed can reach 6-8.5m/s, or higher.The high speed of engine, makes the mass force that acts on piston also increasing, the compression ratio also corresponding raising of engine, combustionvelocity in combustion chamber sharply increases, easily form local pressure in cylinder poor, make piston generation forced vibration, thus cause cavitation pitting or engine knock phenomenon.In addition, piston crown, under the effect of alternating thermal stress, easily produces thermal distortion or decrepitation.So, except the performances such as the normal temperature strength to piston material, hardness, unit elongation, thermal expansivity have certain requirement, also to its high-temperature behavior, as high temperature tensile strength, high temperature fatigue strength, thermal conductivity and wear resisting property have higher requirement.Owing to there is certain performance shortcomings separately in aluminum alloy materials, cast iron materials and the cast steel etc. that are using at present, although as little in aluminum alloy materials density, but the coefficient of expansion is large, high-temperature behavior is poor, cast iron and cast steel density excessive etc., be difficult to meet the over-all properties requirement of modern high performance automobile to piston.
Summary of the invention
The present invention seeks to the piston material preparing a kind of excellent combination property, the performance making up current material is not enough, meets that modern high performance automobile is stability to the wear resistance of piston, working process size, the over-all properties requirement of thermal conductivity, mechanical behavior under high temperature etc.
A kind of preparation method of engine cylinder piston matrix material, namely on the basis of existing aluminium alloy, strengthen by adding a certain amount of diamond particles, sapphire whisker and carrying out mixing by titanium carbide and aluminum silicon alloy generated in-situ titanium silicon-carbon fiber, the dimensional stability of existing aluminium-alloy piston can be improved further, thermal conductivity and mechanical behavior under high temperature, especially wear resistance.Concrete technology: first prepare the porous reinforcement base substrate be made up of diamond particles, sapphire whisker and titanium carbide fibre, then obtained the aluminum matrix composite of fine and close diamond, sapphire whisker and titanium silicon-carbon blending in of fibers enhancing by infiltration process, the titanium silicon-carbon fiber in wild phase is generated by titanium carbide and aluminum silicon alloy reaction in－situ.The preparation of porous reinforcement to be first compound concentration be 4 ~ 5% polyvinyl alcohol solution, then by the titanium carbide fibre reinforcement of the sapphire whisker of polyvinyl alcohol solution and 10-20 μm of diadust, diameter 10 μm, diameter 5-10 μm by (55 ~ 70%): (20 ~ 25%); (5 ~ 10%): the volume ratio of (5 ~ 10%) is carried out mixing and is placed in punching block and is pressed into base substrate, the size of base substrate is determined flexibly according to the size of final piston, is then put by base substrate after drying 4 ~ 5 hours in 50 ~ 60 DEG C in an oven and obtains porous reinforcement base substrate.Infiltration process is, first porous reinforcement base substrate is placed in infiltration stove graphite jig, and be preheated to 300 ~ 350 DEG C, then be Al ~ (10 ~ 12) Si% by composition, temperature is that the molten aluminium alloy of 700 ~ 750 DEG C is poured in the graphite jig that base substrate is housed and carried out pressurization infiltration, moulding pressure is 5 ~ 10MPa, pressing speed is 3 ~ 5mm/min, titanium carbide fibre in infiltration process in base substrate generates titanium silicon-carbon fiber by there is reaction in－situ with the Si in melting Al-Si alloy, diamond particles is obtained after such pressurization completes, sapphire whisker and react the aluminum matrix composite block that the titanium silicon-carbon fiber composite that generates strengthens by titanium carbide and aluminum silicon alloy infiltration process situ, then carry out processing according to final piston size and obtain finished product.
Adopt piston material prepared by above-mentioned technique, owing to the addition of diamond particles, therefore the wear resisting property of material, dimensional stability, especially thermal conductivity is greatly improved, significantly can increase heat-sinking capability during pistons work, friction stability and the mechanical behavior under high temperature of material effectively can be increased after adding appropriate sapphire whisker, and the titanium silicon-carbon generated by reaction in－situ comparatively aluminum oxide and titanium carbide have better toughness and thermal conductivity, the heat dispersion of material can be improved further, wear resisting property and high-temperature behavior, also the deficiency of sapphire whisker in toughness can be made up.Infiltration process is adopted to have excellent over-all properties by adding appropriate diamond, sapphire whisker and the piston prepared by titanium silicon-carbon fiber in aluminum silicon alloy in a word, as high thermal conductivity, wear-resistant, the stability height of size, the coefficient of expansion are little and high-temperature behavior is excellent etc., can be good at meeting the harsh performance requriements of Modern Engine cylinder to piston material.
Accompanying drawing illustrates:
Fig. 1 is process flow sheet of the present invention:
Embodiment:
(1) preparation size is the piston blank of Φ 200mm (external diameter) × 30mm (thick)
First diamond is pressed, sapphire whisker and titanium carbide fibre volume accounting in final matrix material is respectively 20%, 5%, 5% carries out raw material powder mixing, the diamond grit adopted is 10 μm, sapphire whisker diameter 10 μm, titanium carbide fibre diameter 10 μm, according to corresponding density calculation, the quality of three kinds of raw materials is respectively 670 grams, 186 grams and 222 grams, pour into after raw material mixes in 5% polyvinyl alcohol solution filling 565 milliliters and stir, then press forming is carried out by stirring the punching block of expecting to be placed in Φ 200mm, pressing pressure is 3-5MPa.Shaping base is placed in 50 DEG C of baking ovens to dry 5 hours, then base substrate is placed in infiltration stove graphite jig and carries out preheating, graphite jig diameter is Φ 200mm, preheating temperature 350 DEG C, be Al ~ 10Si% by composition again, to be 750 DEG C of quality be temperature that the aluminium alloy of 1500 grams pours in mould then carries out mechanical pressurization, moulding pressure is 10MPa, and pressing speed is 3mm/min, treat that aluminium alloy all infiltrates recession pressure in base substrate and namely obtains piston blank, then carry out precision work according to final dimension.
(2) preparation size is the piston blank of Φ 100mm (external diameter) × 20mm (thick)
First diamond is pressed, sapphire whisker and titanium carbide fibre volume accounting in final matrix material is respectively 25%, 10%, 10% carries out raw material powder mixing, the diamond grit adopted is 20 μm, sapphire whisker diameter 10 μm, titanium carbide fibre diameter 5 μm, according to corresponding density calculation, the quality of three kinds of raw materials is respectively 140 grams, 62 grams and 74 grams, pour into after raw material mixes in 5% polyvinyl alcohol solution filling 86 milliliters and stir, then press forming is carried out by stirring the punching block of expecting to be placed in Φ 100mm, pressing pressure is 3-5MPa.Shaping base is placed in 50 DEG C of baking ovens to dry 4 hours, then base substrate is placed in infiltration stove graphite jig and carries out preheating, graphite jig diameter is Φ 100mm, preheating temperature 300 DEG C, be Al ~ 12Si% by composition, temperature is 700 DEG C, quality is that the aluminium alloy of 230 grams is poured in mould and then carried out mechanical pressurization, moulding pressure is 5MPa, and pressing speed is 5mm/min, treat that aluminium alloy all infiltrates recession pressure in base substrate and namely obtains piston blank, then carry out precision work according to final dimension.
Claims (1)
1. the preparation method of an engine cylinder piston matrix material, it is characterized in that first by 10-20 μm of diadust, the sapphire whisker that diameter is 10 μm, the titanium carbide fibre reinforcement of diameter 5-10 μm and concentration be 4 ~ 5% polyvinyl alcohol solution be 20 ~ 25% according to volume accounting, 5 ~ 10%, 5 ~ 10%, carry out press forming after the ratio of 55 ~ 70% mixes to be enhanced body base substrate, base substrate is dried within 4 ~ 5 hours, to be placed in infiltration stove graphite jig in 50 ~ 60 DEG C in atmosphere and is carried out preheating, preheating temperature is 300 ~ 350 DEG C, then be Al ~ (10 ~ 12) Si% by composition, temperature is that the molten aluminium alloy of 700 ~ 750 DEG C is poured in graphite jig and pressurizeed, moulding pressure is 5 ~ 10MPa, pressing speed is 3 ~ 5mm/min, diamond particles is obtained after having pressurizeed, sapphire whisker and react the aluminum matrix composite block that the titanium silicon-carbon fiber composite that generates strengthens by titanium carbide and aluminum silicon alloy infiltration process situ, then carry out processing according to final piston size and obtain finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410306561.4A CN104087878B (en) | 2014-06-30 | 2014-06-30 | A kind of preparation method of engine cylinder piston matrix material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410306561.4A CN104087878B (en) | 2014-06-30 | 2014-06-30 | A kind of preparation method of engine cylinder piston matrix material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104087878A CN104087878A (en) | 2014-10-08 |
| CN104087878B true CN104087878B (en) | 2015-12-09 |
Family
ID=51635632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410306561.4A Active CN104087878B (en) | 2014-06-30 | 2014-06-30 | A kind of preparation method of engine cylinder piston matrix material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104087878B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422307A (en) * | 2015-11-27 | 2016-03-23 | 宁波市群星粉末冶金有限公司 | Light and wear-resistant automobile engine piston and preparing method thereof |
| CN106145968A (en) * | 2016-07-02 | 2016-11-23 | 成都育芽科技有限公司 | A kind of preparation method of silicon titanium carbon ceramics nozzle |
| CN108085622A (en) * | 2016-11-21 | 2018-05-29 | 宜兴市帝洲新能源科技有限公司 | A kind of cylinder material of optoelectronic device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1422971A (en) * | 2002-12-11 | 2003-06-11 | 山东大学 | Aluminium-based composite material for piston and preparation method thereof |
| CN1557987A (en) * | 2004-02-02 | 2004-12-29 | 北京科技大学 | Preparation method for reinforced aluminum base composite material composed by in situ alpha-Al2O3 crystal whisker and TiC grain |
| JP2008069377A (en) * | 2006-09-12 | 2008-03-27 | National Institute For Materials Science | Method for forming cermet coating film and cermet coated member obtained thereby |
| CN102080173A (en) * | 2009-11-26 | 2011-06-01 | 胡明 | Technological process for preparing Al2O3-TiC aluminum-based composite material |
| CN102978434A (en) * | 2012-12-13 | 2013-03-20 | 北京科技大学 | Short fiber-particle synergetically-reinforced copper-based composite material and preparation method thereof |
| CN103343274A (en) * | 2013-07-24 | 2013-10-09 | 上海交通大学 | High-thermal-conductivity graphite-aluminium composite material reinforced by diamond particles in hybrid manner and preparation process for same |
-
2014
- 2014-06-30 CN CN201410306561.4A patent/CN104087878B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1422971A (en) * | 2002-12-11 | 2003-06-11 | 山东大学 | Aluminium-based composite material for piston and preparation method thereof |
| CN1557987A (en) * | 2004-02-02 | 2004-12-29 | 北京科技大学 | Preparation method for reinforced aluminum base composite material composed by in situ alpha-Al2O3 crystal whisker and TiC grain |
| JP2008069377A (en) * | 2006-09-12 | 2008-03-27 | National Institute For Materials Science | Method for forming cermet coating film and cermet coated member obtained thereby |
| CN102080173A (en) * | 2009-11-26 | 2011-06-01 | 胡明 | Technological process for preparing Al2O3-TiC aluminum-based composite material |
| CN102978434A (en) * | 2012-12-13 | 2013-03-20 | 北京科技大学 | Short fiber-particle synergetically-reinforced copper-based composite material and preparation method thereof |
| CN103343274A (en) * | 2013-07-24 | 2013-10-09 | 上海交通大学 | High-thermal-conductivity graphite-aluminium composite material reinforced by diamond particles in hybrid manner and preparation process for same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104087878A (en) | 2014-10-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101418413B (en) | Niobium alloy cast iron brake disk material and technique for producing the same | |
| CN103878346B (en) | A kind of preparation method of ceramic particle multi-scale enhancement metal matrix composite materials | |
| CN1107795C (en) | Air cylinder body and its metal base composite prefabricate element | |
| CN104844225B (en) | Self-lubrication ceramic cutter material of carborundum cladding hexagonal boron nitride powder modified and preparation method thereof | |
| CN104235237A (en) | Road vehicle brake disc made of carborundum foamed ceramics/aluminum alloy composite materials and production method of road vehicle brake disc | |
| CN103075445A (en) | Ceramic/metal composite material brake lining for high-speed train and preparation method of ceramic/metal composite material brake lining | |
| CN104087878B (en) | A kind of preparation method of engine cylinder piston matrix material | |
| CN101693972B (en) | Method for preparing heat resistant rare earth-magnesium alloy engine pistons through squeezing and casting | |
| CN109321767A (en) | A kind of method that compound augmentation prepares aluminium based composite material enhanced by miscellaneous granules | |
| CN101381242A (en) | Method for preparing crucible for smelting titanium and titanium alloys | |
| CN101161374B (en) | Reactant composition for preparing multiple phase confusion TiB2-TiC ceramic particle gradient enhancement metal-based complex material | |
| CN104177104B (en) | A kind of preparation method of titaniferous nitride in-situ composite aluminum-carbon refractory material | |
| CN101892398B (en) | Method for preparing ceramic/aluminum alloy gradient composite material | |
| CN105801140A (en) | Preparation method of sialon bonded corundum-silicon carbide composite refractory material | |
| CN102676956B (en) | Method for preparing iron-based surface composite material by virtue of in-situ synthesis | |
| CN104651655A (en) | Preparation method of graphite-reinforced aluminum-based composite material | |
| CN101532111A (en) | Tic particle dispersion strengthening gray cast iron and method for preparing same | |
| CN106966750B (en) | A kind of graphene modified composite material piston and preparation method and application | |
| CN102815957B (en) | Nonferrous metal alloy-toughened aluminum nitride ceramic-based composite material and preparation method thereof | |
| CN109396419A (en) | A kind of ceramic phase reinforcement and preparation method thereof | |
| CN102899517A (en) | In-situ SiC-TiC particle mixing enhanced aluminum-based composite material and preparation process thereof | |
| CN104532100A (en) | Method for manufacturing silicon carbide and iron composite material | |
| JP2012136958A (en) | Piston formed of aluminum alloy composite material, internal combustion engine equipped with the same, and manufacturing method of piston formed of aluminum alloy composite material | |
| CN104084560B (en) | A kind of method preparing brake rim aluminum matrix composite | |
| CN206326878U (en) | Carbon/carbon compound material blank forming mould based on carbon fiber powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |